Apparatus



C. R. HAUSER.

CYLINDER GRINDING APPARATUS.

APPLICATION FILED MAR. II, I920.

1,359,699. PatentedN0v.23,1920.

i N H 3! u iTo s'rnrss err FT its.

CHARLES R. HAUSER, OF DENVER, COLORADO.

CYLINDER-GRINDING APIARATUS.

Application filed March 11, 1920. Serial No. 365,052.

To all whom 2'1; may concern:

Be it known that I, GrrAnLns H. Human, a citizen of the United States of America, and a resident of Denver, county of Denver, and State of Colorado, have invented certain new and useful Improvements in Cylinder-Grindin Apparatus, of which the .fol lowing is a full and clear specification.

The object of this invention is to provide a simple apparatus which may be attached to and operated in an ordinary metal-working lathe and which will etliciently and truly grind the interior surfaces of engine cylinders, as more fully hereinafter set forth.

In the drawings- Figure 1 is a view partly in side elevation and partly in longitudinal section;

Fig. 2 is a side elevation;

Fig. 3 is a transverse section on the line 33 of Fig. 1;

Fig. 4 is a transverse section taken through the motor casing and counter-weight;

Figs. 5, 6, 7 and 8 afe detail parts hereinafter specifically described.

The figures of the drawings illustrate the various details of the invention in its pre{ ferred form. r

Referring to the drawings annexed by-reference-characters, a designates a solid cylindrical metal bar which is adapted to be" supported at its ends respectively in the tail-stock and head-stock of a lathe, so as to be rotated by the usual lathe mechanism, this bar being provided at each end with a central recess 6 for the usual lathe center. Mounted in a recess at one end of this bar is an electric motor 0, this motor being rigidly fastened to the bar by suitable screws d. Diametrically opposite the motor, the bar provided with a counter-weight e which is fastened in any suitable manner, this counter-weight serving to balance the bar in its axial rotation and thus avoid undue vibration or wabbling of the bar.

The current for the motor is received through a pair of contact-rings 7 carried near one end of the bar a. The shaft of the motor is connected by a universal joint to a propeller-shaft g which lies in a longitudinal groove it formed along one side of the bar a, the inner end of this propeller shaft 9 being connected by another universal joint to a shaft 2' which is journaled in suitable bronze bearings 31' mounted in a pedestal-block 7r; fitted in said groove 72, and adapted to be radially adjusted by means of a series of set-screws Z, another series of screws mbeing employed at the side to hold the pedestal in its radially adjusted position. The pedestal, it will be understood, fits the fiat straight walls of the groove 71; nicely so that in the operation of the apparatus the shaft z'will be ield true and steady.

The inner end of the shaft 2' has afiixed to it the grinding-wheel n which runs in a laterally-enlarged pocket 0 formed at the extreme inner end of the groove it, said; grindlng-wheel having its periphery projectcry of the carrying-bar a.-

lft will be observed that when the carrying bar a is mount'ed'in the lathe, it will be rotatedby the usual mechanism of the lathe,

ing more or less beyond the annular periphand that during this axial rotation of the bar the grinding-wheel will be rapidly ro teted by the motor, thus giving to the grind ing-wheel a planetary motion. It will'be observed, therefore, that this apparatus is extremely simple in construction and operation and adjustment and that a special feature of advantage lies in the fact that it may be readily operated in any lathe of the proper size. Of course, it will be understood that the cylinder is mounted upon the usual lathe-saddle and is automatically fed along the lathe-bed in the usual manner during the rotation of the grinding-wheel.

It will be understood that the pedestal or spindle-block It may be adjusted as well as locked in its adjusted position by any suitable means. I prefer the use of a plurality of screws Z for radially adjusting the block, and a plurality of additional screws m for engagement with opposite sides of the block for assisting in holding it in its position. The screws Z will be journaled rotatably in the bar a and willhave their inner ends engaged in threaded holes in the bottom of the spindle-block; and these screws Z will be held against longitudinal movement by lateral set-screws p tapped tangentially into the bar a and having a smooth reduced inner end 9 which enters an annular groove in the screw Z. These small screws 3? will be headless and will be properly counter-sunk in the bar a, and by that the screws Z will be locked against rota- 7 tion. To measure the adjustment of the pedestal or spindle-block, I may form a circular graduated scale 0 on the bar a, around the head of each screw Z, thereby enabling me to make not only a line adjustment but also a predetermined adjustment of the pedestal block.

To insure accurate radial guidance of the spindle-block 7c, the block is provided at opposite sides with grooves 1" in which work the inner ends of the binding screws m. The

groove h in the supportingbar is deepened at its inner end and this pedestalor spindleblock fits in this depression, one end of the block abutting against a shoulder s and the other, reduced, end of the block abutting against the shoulder 6 formed at one side of the enlarged recess 0. In this manner, the pedestal-block is assured not only of accu rate radial movement in its adjustments, but is also insured against longitudinal movement of the carrying-bar, thereby contributing materially to accuracy of work. Any suitable means may be employed for supplying current to the motor. The means disclosed consists, as stated, of two contactrings 7 which are mounted on an insulating band a affixed to the bar a and connected reextended at 2 for attachment, by clamps or otherwise, to a stationary part of the lathe structure, an insulating piece a. being pro-' vided for convenience in handling the brush.

The nature and scope of the invention having been thus indicated and its preferred embodiment having been specifically described, what is claimed as new is:

1. In a lathe attachment of the class set forth, a bar adapted to be supported in and rotated by the lathe-stocks, an electric motor mounted on the bar at one end and means for supplying current to the motor during the rotation of the bar, a grinding-wheel carrying-shaft journaled in adjustable bearings mounted in a groove in the bar and adapted to be rotated by said motor.

2. In a lathe attachment of the class described, a bar adapted at its ends for at tachment to the usual lathe-stocks so as to be axially rotated thereby, said bar being provided with a longitudinal groove terminating at each end in a pocket or recess, an electric motor mounted in the recess nearest the end of the bar, a grinding-wheelshaft mounted in adjustable bearings in said groove and having its grinding-wheel located in the other recess, this shaft being connected to the shaft of the motor, and a counter-Weight arranged on the bar diametrically opposite the motor.

3. A cylinder-grinding apparatus in the form of a lathe attachment embodying a bar adapted to be received in a lathe and rotated thereby, said bar carrying an electrio motor and a radially adjustable grinding means operated by said motor, and means for supplying current to the motor during the rotation of the bar.

In testimony whereof I hereunto affix my signature.

CHARLES R. HAUSER. 

